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Characteristics of Natural Light LEDs (1)Recreating Sunlight

Because it includes all wavelengths of visible light from violet to red, it has characteristics very close to natural light from the sun.

Image comparing color rendering properties

Natural-light (high color rendering) LED Regular white LED

Example of light spectrum of sunlight

Visible light

Example of light spectrum of natural-light (high color rendering) LEDs

Achieve light spectrums which couldn’t be expressed with conventional LEDs!

Example of light spectrum of halogen bulb

Wavelengths from infrared radiation results in a great amount of radiant heat.

Example of light spectrum of regular white LED light

Blue is extremely strong and red components are weak.

Example of light spectrum of three-wavelength fluorescent light

Specific wavelengths are extremely strong.

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Ultra-high color rendering


CCS ‘Natural Light LEDs’ use violet excitation and include all wavelengths of visible light from violet to red, and thus have characteristics extremely close to natural light from the sun.

The general color rendering index, which indicates the color reproducibility, is Ra98 achieving the highest level in the LED light industry.
This achieves the color of the illuminated object true to nature.

Also in your specified correlated color temperature (*1), the LEDs maintain Ra95 or higher. Furthermore, this achieves high values not only in the general color rendering index, but also in the special color indexes which express colors such as ‘primary colors’ and ‘skin color.’

(*1: The correlated color temperature is approx. 2700 to 5500 K.)

General color rendering index of Ra95 or higher  High special color rendering index as well

natural-light (high color rendering) LED regular white LED

What Are Color Rendering Properties?

“Color rendering” refers to the way we see the color of an object when a light source, such as a light bulb, fluorescent light, or LED light, is shown on that object.“Color rendering properties” refers to the properties for evaluating that rendering.Generally speaking, “a light source with good color rendering properties” refers to lights which accurately illuminate the color of the object respective to standard illuminants, and the highest value is set at a color rendering index of 100. In Japan, there are JIS standards which determine the color rendering index, allowing for color rendering properties to be quantified and compared.

General color rendering index Ra: Avg. value of R1 to R8 *Special color rendering index Ri: Individual evaluation of colors R1 to R15

Structural difference in white LEDs

  • Natural-light LED

    Ultraviolet excitation-type LED chips + Blue, green, and red fluorescent substances e.g. Ra95 min.

  • High color rendering white LED

    Blue excitation-type LED chips + Green and red fluorescent substances e.g. About Ra90

  • White LED

    Blue excitation LED chips + Yellow fluorescent substances e.g. Ra70 to 85

General white LEDs achieve white color based on the LED chip for blue excitation. However, CCS Natural Light LEDs are based on the LED chip for
violet excitation and include visible light from violet to red.

*We developed Natural Light LEDs in November of 2007.

  • Natural Light LED

    High color rendering properties (color reproducibility) in a wide range of color temperatures

  • High Color Rendering White LED

    Color rendering properties (color reproducibility) decrease in high color temperatures due to lack of short-wavelength components

  • White LED

    Low color rendering properties (color reproducibility) in all color temperatures

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Tuning the correlated color temperature and light spectral distribution

CCS’s integrated production system from development to commercialization allows for tuning to realize your needs.

LED tuning technology possible because of our in-house product

Customized to realize your needs,Specify the correlated color temperature (2700 to 5500 K),Light spectral distribution tuning

Tuning Examples

  • Correlated color temperature close to illuminant A (2,856 K)

  • Correlated color temperature close to illuminant D65 (6,504 K)

  • Allows for specification of the correlated color temperature(2700 to 5500 K *10000 K or higher is possible.)

  • Light spectral distribution with few green wavelength components

  • Products to prevent variations in chromaticity

Original Natural Light (high color rendering) LED devices

We perform tuning for the specified color and spectral distribution.

  • Achieve high color rendering in a broad range of chromaticity.
  • Consult with us regarding the range of disparity.
  • We offer consultation regarding special spectral distribution as well.

LEDdevice

LEDdevice SMDdevice COBdevice
SMDdevice SMDdevice SMDdevice COBdevice
Number of mounted chips 3 6 1 100
General color rendering properties Ra97 Ra97 Ra97 Ra97
Maximum rated IF [mA] current 180 360 500 530
Typical VF[V] voltage 3.4 3.4 3.5 34.0
Luminous flux [lm] 41 92 65 540
Efficiency [lm/w] 67 75 37 35

About LED devices

LEDs are produced by assembling various materials such as LED chips, phosphor, packaging,
and sealing resin, and by handling complex optical, chemical, and structural dynamic phenomena.

SMDSurface-mounted type

SMDpackaging technology

Higher efficiency
[Phosphor] Optimized material and sealing method[Sealing resin] Optimized material characteristics and surface shape[Optimal reflector shape] Wall surface height, angle, high reflectivity
Longer service life
[Sealing resin] Improved heat/light resistance[Bonding material] Improved heat/light resistance, high heat dissipation[Packaging material] High reflectivity, high heat dissipation

COBチップオンボードタイプ

COB実装技術

Higher efficiency
[Phosphor] Optimized material and sealing method[Dam material] High reflectivity, molded[Circuit board material] High reflectivity, high heat dissipation
Longer service life
[Sealing resin] Improved heat/light resistance[Mounting pattern] Narrow pitch, high reflectivity[Bonding material] Improved heat/light resistance, high heat dissipation
 

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Transaction flow

Inquiry
Specifications study
Design procedures
Proposal of specifications and costs
Order
Production, inspection and shipping

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